The query "11th september ko kya hai" functions as a noun phrase where its core, "September 11th," is a proper noun. This date primarily refers to the series of four coordinated terrorist attacks by the Islamic extremist group al-Qaeda against the United States on the morning of September 11, 2001. This event is a defining moment in modern history.
The attacks were executed using four hijacked commercial airliners. Two aircraft were flown into the Twin Towers of the World Trade Center in New York City, causing both 110-story skyscrapers to collapse. A third aircraft was crashed into the Pentagon, the headquarters of the U.S. Department of Defense, in Arlington, Virginia. The fourth plane, initially targeting a location in Washington, D.C., crashed in a field in Shanksville, Pennsylvania, after passengers and crew attempted to regain control. The attacks resulted in 2,977 deaths, including the 19 hijackers, making it the deadliest terrorist attack in world history.
The significance of September 11th extends far beyond the immediate devastation. In the United States, it is formally recognized as Patriot Day, a national day of mourning and remembrance. The event served as the catalyst for the U.S.-led "War on Terror," which included the invasion of Afghanistan to depose the Taliban and pursue al-Qaeda. Globally, the attacks prompted a fundamental shift in security and counter-terrorism policies, leading to heightened airport security, increased government surveillance powers, and a new era of international relations focused on combating non-state terrorist organizations.
